Kuv tuaj yeem txhim kho kev nyab xeeb ntawm lub roj teeb li cas?

著者：Iflowpower – Dodavatel přenosných elektráren

1. Siv lub roj teeb lithium electrolyte ruaj ntseg tam sim no lithium roj teeb electrolyte siv carbonate raws li cov kuab tshuaj, nyob rau hauv cov linear carbonate tuaj yeem txhim kho cov nqi thiab tso tawm lub peev xwm ntawm lub roj teeb, tab sis lawv qhov flash point yog qis, ntawm qhov kub thiab txias nws yuav flash, thiab fluoro hnyav feem ntau muaj qhov taw tes siab dua lossis tsis muaj flash, yog li cov fluoro hnyav yog siv los tiv thaiv electroly combustion. Tam sim no kawm fluoride cov kuab tshuaj muaj xws li fluoroate thiab fluoroethyl ether.

Nplaim hluav taws xob hluav taws xob yog cov khoom siv hluav taws xob ua haujlwm uas cov nplaim hluav taws xob ua haujlwm ntawm cov electrolytes feem ntau tau txais los ntawm kev ntxiv cov nplaim hluav taws xob ntxiv hauv cov pa hluav taws xob. Nplaim-retardant electrolyte tam sim no daws qhov kev lag luam zoo tshaj plaws thiab kev ntsuas zoo rau lithium roj teeb kev nyab xeeb, tshwj xeeb tshaj yog rau kev lag luam. Siv cov khoom siv electrolytes, es tsis txhob ntawm cov organic kua electrolytes, zoo txhim kho kev nyab xeeb ntawm lithium roj teeb.

Cov khoom electrolytes muaj xws li polymer cov khoom electrolytes thiab inorganic khoom electrolytes. Cov polymer electrolyte, tshwj xeeb tshaj yog cov gel-hom polymer electrolyte, tau ua zoo heev nyob rau hauv lub lag luam lithium roj teeb, tab sis cov gel-hom polymer electrolyte yog tiag tiag ib tug qhuav-state polymer electrolyte thiab ib tug ua kua electrolyte compromise. Yog li ntawd, nws yog qhov txwv heev hauv kev txhim kho cov roj teeb kev nyab xeeb.

Vim lub electrolyte ntawm qhuav-state polymerization, vim nws tsis zoo li gel-type polymer electrolyte, nws muaj kev ruaj ntseg zoo dua nyob rau hauv cov nqe lus ntawm to, vapor siab thiab combustion. Tam sim no, tam sim no aggregate electrolyte tsis tau raws li daim ntawv thov ntawm polymer lithium roj teeb, thiab kev tshawb fawb ntxiv yuav tsum tau siv dav hauv polymer lithium roj teeb. Phase ntsig txog polymer electrolyte, inorganic khoom electrolyte muaj kev ruaj ntseg zoo dua, tsis muaj volatilization, tsis muaj combustion, ntau tsis muaj teeb meem to.

Tsis tas li ntawd, cov neeg kho tshuab lub zog ntawm cov khoom tsis muaj zog electrolyte yog siab, qhov kub-resistant kub yog siab dua li cov kua electrolyte thiab cov organic polymer, ua kom lub zog ua haujlwm kub ntawm lub roj teeb; cov ntaub ntawv inorganic yog tsim rau hauv ib zaj duab xis, uas yog ntau dua yuav ua tau ib tug lithium roj teeb miniaturization, thiab hom roj teeb no muaj Ultra-ntev cia lub neej yuav ua tau zoo heev broaden daim ntawv thov teb ntawm lithium roj teeb uas twb muaj lawm. 2. Txhim kho qhov teeb meem kev nyab xeeb ntawm cov thermostability ntawm cov khoom siv electrode yog ncaj qha los ntawm qhov tsis zoo electrolyte, tab sis los ntawm cov hauv paus ntsiab lus, nws yog vim lub roj teeb nws tus kheej tsis siab, qhov tshwm sim ntawm thermal tawm ntawm kev tswj tau tshwm sim.

Ntxiv rau qhov thermal stability ntawm cov electrolyte, thermal stability ntawm cov electrolyte kuj yog ib qho tseem ceeb tshaj plaws, yog li cov thermal stability ntawm cov khoom siv electrode kuj yog ib qho tseem ceeb ntawm kev txhim kho kev nyab xeeb ntawm cov roj teeb, tab sis cov electrode tau hais los saum no Cov thermal stability ntawm cov khoom tsis yog tsuas yog nws tus kheej thermal stability, tab sis kuj muaj xws li thermal stability ntawm cov khoom siv electrolyte. Feem ntau, qhov thermal stability ntawm cov khoom tsis zoo electrode yog txiav txim siab los ntawm kev ua haujlwm ntawm cov khoom siv thiab cov kev them nyiaj tsis zoo electrode. Hais txog cov khoom siv carbon, cov khoom siv hlau kheej kheej, xws li cov pa roj carbon microspheres nruab nrab (MCMB), nrog qhov sib piv qis dua, tus nqi siab dua thiab tawm lub platform, yog li nws lub xeev them me dua, thiab thermal stability kuj sib piv.

Zoo, kev ruaj ntseg siab. Li4Ti5O12 ntawm cov qauv spinel zoo dua li cov qauv kev ruaj ntseg ntawm cov laminated graphite, thiab cov nqi thiab tawm platform yog ntau dua, yog li thermal stability zoo dua thiab kev nyab xeeb siab dua. Yog li ntawd, MCMB los yog Li4Ti5o12 feem ntau yog siv nyob rau hauv lub hwj chim lithium-ion roj teeb ntawm kev nyab xeeb yuav tsum tau los hloov graphite zoo tib yam li ib tug tsis zoo electrode.

Ntxiv nrog rau cov khoom siv nws tus kheej, thermal stability ntawm cov khoom tsis zoo electrode muaj kev txhawj xeeb ntau dua txog cov thermal stability ntawm cov khoom electrolyte membrane (SEI) ntawm qhov tsis zoo electrolyte interface ntawm electrolyte interface, uas feem ntau siv los ntawm tib cov khoom, tshwj xeeb graphite. Xav tias nws yog thawj kauj ruam ntawm qhov tshwm sim ntawm qhov kub poob. Muaj ob txoj hauv kev tseem ceeb los txhim kho cov thermal stability ntawm SEI zaj duab xis: ib qho yog txheej txheej ntawm cov khoom tsis zoo electrode, xws li txheej txheej amorphous charcoal lossis hlau txheej ntawm cov graphite; lwm qhov yog ntxiv cov yeeb yaj kiab tsim cov khoom siv ntxiv hauv cov electrolyte, hauv cov roj teeb Thaum lub sijhawm ua haujlwm, lawv tsim SEI zaj duab xis uas muaj kev ruaj ntseg ntawm cov khoom siv electrode, uas yog qhov zoo rau kom tau txais thermal stability zoo dua.